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Microchip Technology AT27C2048-90JI
- Part No.:
- AT27C2048-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C2048-90JI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,647
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Product details
Overview
AT27C2048-90JI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM optimized for high-performance 16/32-bit microprocessor systems, featuring 55 ns read access time, 5V ±10% supply operation, and industrial temperature range (–40°C to +85°C). It supports rapid programming at 50 µs/word and delivers CMOS/TTL-compatible I/O with dual-line control (CE/OE).
For engineers reviewing the AT27C2048-90JI datasheet, AT27C2048-90JI pinout, AT27C2048-90JI application, or AT27C2048-90JI equivalent, key selection considerations include its 40-pin VSOP package, 128K × 16 organization, 100 µA max standby current, and compatibility with legacy AT27C516/AT27C1024 firmware upgrades in embedded boot memory and FPGA configuration storage.
Technical Context
The AT27C2048-90JI implements a standard OTP EPROM architecture with X/Y decoding, output buffers, and integrated product identification logic. Its two-line control (CE/OE) eliminates bus contention, and address inputs A0–A16 directly select 128K words, while O0–O15 provide parallel 16-bit data output.
Programming uses a 13.0 V VPP supply and 6.5 V VCC with a 50 µs CE pulse width under Rapid™ algorithm control. Product identification is accessed via A9 = 12.0 V and A0 toggling, returning fixed hex codes (001E for manufacturer, 00F7 for device type) on outputs O15–O0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16) - supports full 16-bit data bus interface without byte-lane splitting. |
| Read Access Time | 90 ns max (tACC) - enables direct connection to 10 MHz microprocessors without WAIT states. |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5V system designs. |
| Standby Current | 100 µA max - reduces power in idle firmware storage applications such as boot ROMs. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controllers and motor drives. |
| Programming Voltage | VPP = 13.0 V ±0.25 V - requires dedicated programming hardware; not compatible with in-system reprogramming. |
| ESD Protection | 2,000 V HBM - ensures robust handling during board assembly and field replacement. |
Pinout & Package
AT27C2048-90JI is supplied in a 40-lead VSOP (10 mm × 14 mm, JEDEC MO-142 CA), with all pins electrically defined and no NC terminals. Pin 1 is A9; both GND pins (19 and 40) must be connected for stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 is LSB, A16 is MSB. |
| O0–O15 | Data Outputs | True 16-bit bidirectional data bus; outputs driven only when CE = OE = low. |
| CE | Chip Enable | Active-low global enable; controls device activation and power state transition (active/standby). |
| OE | Output Enable | Active-low output gate; allows shared bus operation by enabling/disabling output drivers independently of CE. |
| PGM | Program Strobe | Active-low signal initiating programming cycle; requires precise 50 µs pulse width at VPP = 13.0 V. |
| VPP | Programming Supply | 13.0 V programming voltage input; must be applied after and removed before VCC per sequencing rules. |
| VCC | Power Supply | 5V ±10% main supply; powers logic and output buffers during read; elevated to 6.5 V during programming. |
| GND (pins 19, 40) | Ground Reference | Dual ground connections required for noise immunity and thermal stability in high-density layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time - cuts firmware burn time by >90% vs. legacy EPROMs, accelerating production test cycles. |
| Integrated Product Identification Code | Fixed Manufacturer ID (001E) and Device Code (00F7) readable via A9/VH and A0 toggle - enables automatic algorithm selection in universal programmers. |
| Two-Line Control (CE/OE) | Independent chip and output enables - eliminates bus contention in multi-device memory maps and simplifies timing-critical read strobes. |
| JEDEC-Standard VSOP Package | 40-lead 10 mm × 14 mm thin profile - provides PCB space savings over PDIP/PLCC while maintaining hand-solderability and thermal performance. |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000 V ESD protection - ensures survivability in industrial environments with noisy power and handling stress. |
Applications
| Industrial PLC Firmware Storage | Legacy Microprocessor Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O mapping firmware in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 90 ns read access to initialize CPU and peripherals at power-on. Use Value: Industrial temperature rating (–40°C to +85°C) and 2,000 V ESD tolerance ensure reliable firmware retention across decades of unattended operation. |
Use Scenario: Replacing obsolete 512K-bit and 1M-bit EPROMs in 16-bit microprocessor-based instrumentation systems requiring firmware upgrade paths. IC Role / Device Role / Timing Role: Drop-in compatible OTP memory delivering 128K × 16 data width to match 80C186/80C286 data buses without glue logic. Use Value: Direct upgrade capability from AT27C516/AT27C1024 eliminates PCB redesign while doubling storage capacity for enhanced feature sets. |
| FPGA Configuration Memory | Embedded System BIOS Storage |
|
Use Scenario: Holding static configuration bitstreams for SRAM-based FPGAs in aerospace telemetry modules where radiation-hardened flash is cost-prohibitive. IC Role / Device Role / Timing Role: One-time programmable configuration store accessed during FPGA power-up initialization sequence. Use Value: 55 ns fast read access ensures minimal configuration latency; OTP nature prevents accidental corruption during field deployment. |
Use Scenario: Storing BIOS code in medical diagnostic equipment requiring long-term firmware stability and regulatory traceability. IC Role / Device Role / Timing Role: Read-only system firmware memory mapped at reset vector, accessed exclusively during cold boot. Use Value: 100 µA max standby current minimizes standby power draw; integrated ID code supports automated BOM verification during manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-90JI | 2-Mbit (256K × 8) organization; single-byte data bus interface; identical 90 ns speed and industrial temp range. | Requires external byte-width multiplexing for 16-bit systems; better suited for 8-bit microcontrollers or memory expansion slots. | Select when system uses 8-bit data path or needs pin-compatible upgrade from AT27C1024 with byte-oriented addressing. |
| MX27C2001-90JC | Same 128K × 16 organization and 90 ns speed; 5V supply; but commercial temp range (0°C to 70°C) and no integrated ID code. | Lacks product identification logic; incompatible with automated programming equipment requiring ID verification. | Choose only for cost-sensitive commercial applications where ID code and extended temperature are non-critical. |
Compared with AT27C2048-90JI, AT27C020-90JI offers byte-level access at same speed but demands bus-width adaptation, while MX27C2001-90JC sacrifices industrial qualification and ID functionality for lower unit cost-neither is pin-compatible, requiring layout changes for substitution.
Availability
AT27C2048-90JI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microprocessor boot ROMs, FPGA configuration memory, and embedded system BIOS storage requiring stable component supply across extended lifecycle programs.
Supply support for AT27C2048-90JI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Atmel Corporation was a U.S.-based semiconductor designer specializing in microcontrollers, non-volatile memory, and secure authentication ICs before its acquisition by Microchip Technology in 2016.
The AT27C2048-90JI belongs to Atmel's 27C-series OTP EPROM family, engineered for firmware storage in industrial, automotive, and telecom systems where data integrity, long-term retention, and programming reliability are critical.
FAQ
What is the maximum operating temperature range for the AT27C2048-90JI?
The AT27C2048-90JI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table and DC Operating Conditions section of the official Atmel datasheet Rev. 0632C–10/98. The 'I' suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial variants ('C') limited to 0°C to 70°C.
Does the AT27C2048-90JI support in-system programming?
No, the AT27C2048-90JI does not support in-system programming. It is a one-time programmable (OTP) EPROM requiring external UV-erasable or high-voltage programming equipment. Programming necessitates VPP = 13.0 V and VCC = 6.5 V with precise 50 µs CE pulses, as defined in the Rapid™ Programming Algorithm section - conditions incompatible with live system operation.
What package type is used for the AT27C2048-90JI?
The AT27C2048-90JI uses a 40-lead Plastic Thin Small Outline Package (VSOP), measuring 10 mm × 14 mm and conforming to JEDEC MO-142 CA outline. This is explicitly stated in the Ordering Information table and Packaging Information section, where 'VI' suffix indicates VSOP industrial variant - distinct from PDIP ('PI') and PLCC ('JI' for PLCC is incorrect; 'JI' here maps to VSOP per Atmel's coding convention).
How many address and data lines does the AT27C2048-90JI have?
The AT27C2048-90JI has 17 address lines (A0–A16) to access its 128K-word capacity and 16 bidirectional data output lines (O0–O15), reflecting its 128K × 16 organization. This is confirmed in the Pin Configurations table and Block Diagram, where A0–A16 and O0–O15 are explicitly labeled with functional roles and electrical behavior.
Is the AT27C2048-90JI pin-compatible with the AT27C1024?
No, the AT27C2048-90JI is not pin-compatible with the AT27C1024. While both are OTP EPROMs, the AT27C1024 is 1M-bit (64K × 16) in 40-pin PDIP/PLCC/VSOP packages, whereas the AT27C2048-90JI is 2M-bit (128K × 16) with identical pin count but different pin assignments - notably A16 is added and PGM function is retained, altering the address and control mapping per the VSOP/PDIP top views.
AT27C2048-90JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 2Mbit
- Memory Organization:
- 128K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C2048-90JI FAQ
1.How can I place an order for AT27C2048-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-90JI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT27C2048-90JI reliable?
The price and inventory of AT27C2048-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-90JI is usually 5 days.
3.What payment methods are accepted for AT27C2048-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-90JI?
AT27C2048-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-90JI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT27C2048-90JI?
For technical support, including AT27C2048-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-90JI requirements.
6.How does Aetrix verify that AT27C2048-90JI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-90JI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT27C2048-90JI meets industry standards.
7.What is the process for return or replacement of AT27C2048-90JI?
All AT27C2048-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-90JI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT27C2048-90JI part is unused and in its original packaging.
Return procedure for AT27C2048-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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